ΔE 6.4, close: similar, with a visible difference side by side. Interior Green is more muted, cooler than RAL 6040 F9 Helloliv.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Interior Green is more muted, cooler than RAL 6040 F9 Helloliv.
The same difference applies the other way round: RAL 6040 F9 Helloliv is more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See RAL 6040 F9 Helloliv on the colour wheel See Interior Green on the colour wheel
All matches: RAL 6040 F9 Helloliv equivalents · Interior Green equivalents